Submission #1053719

#	Time	Username	Problem	Language	Result	Execution time	Memory
1053719		tht2005	Commuter Pass (JOI18_commuter_pass)	C++17	24 / 100	27 ms	1884 KiB

commuter_pass

#include <bits/stdc++.h>

using namespace std;
 
const int MAXN = 303;
 
int n, m, s, t, u, v;
long long d[MAXN][MAXN];
 
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cin >> n >> m >> s >> t >> u >> v;
    memset(d, 0x3f, sizeof(d));
    for(int i = 1; i <= n; ++i)
        d[i][i] = 0;
    while(m--) {
        int a, b;
        long long c;
        cin >> a >> b >> c;
        d[a][b] = min(d[a][b], c);
        d[b][a] = min(d[b][a], c);
    }
 
    for(int k = 1; k <= n; ++k)
        for (int i = 1; i <= n; ++i)
            for (int j = 1; j <= n; ++j)
                d[i][j] = min(d[i][j], d[i][k] + d[k][j]);
 
    long long ans = d[u][v];
    for(int i = 1; i <= n; ++i) {
        if(d[s][i] + d[i][t] != d[s][t]) continue;
        for(int j = 1; j <= n; ++j) {
            if(d[s][i] + d[i][j] + d[j][t] != d[s][t]) continue;
            ans = min(ans, d[u][i] + d[j][v]);
            ans = min(ans, d[u][j] + d[i][v]);
        }
    }
    cout << ans;
    return 0;
}

• Subtask 1: 0 / 16
• Subtask 2: 0 / 15
• Subtask 3: 24 / 24
• Subtask 4: 0 / 45